Note 2 - Effects of Adjustments to Correct Immaterial Errors, Balance Sheet (Details) - USD ($) $ in Thousands	Jul. 02, 2016	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013
Scenario, Previously Reported [Member]
Accrued income taxes		$ 10,621
Total current liabilities		209,833
Total equity		744,198	$ 727,665	$ 686,916
Restatement Adjustment [Member]
Accrued income taxes		4,946
Total current liabilities		4,946
Total equity		(4,946)	(3,346)	(2,028)
Accrued income taxes	$ 6,682	15,567
Total current liabilities	178,788	214,779
Total equity	$ 774,857	$ 739,252	$ 724,319	$ 684,888